These small, red sores are often painful, but they are not contagious.
Canker sores have multiple potential triggers, including diet, allergies, viruses, and hormonal changes.
But for painful or bothersome canker sores on the tongue, experts recommend a few treatment tactics.
Illustration by Mira Norian for Verywell Health
Canker Sore vs. A cold sore is because of the contagious herpes simplex virus, while canker sores are not contagious.
A cold sore often develops outside of the mouthtypically on the corner of the lip.
They’re small blisters that break, leak fluid, and scab over.
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Cold sores are most painful on the first day.
Some people may experience a tingling sensation in the area shortly before the cold sore appears.
Why Do Canker Sores Appear?
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Some canker sores develop without an apparent reason, while others may be linked to an underlying cause.
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Medications
Certain medications may also cause frequent canker sores.
Common culprits include certain foods and ingredients in toothpaste or mouthwash.
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